!Acorus calamus Acorus calamus, also known as Boch, Vacha, and Vayambu, is a medicinal plant. This perennial herb of marshy habitats is easy to cultivate through rhizome cuttings in tropical and sub-tropical zones. The tubers are traded as it is reputed as brain tonic, coolant and drug for colic. It has high demand in the market. Commercial production from 3rd year.